LBE Unlimited Barrel Nut — Black — AR-15 (Model ARBNT, UPC: 765857617428)

Upgrade the heart of your AR-15 upper with the LBE Unlimited Barrel Nut (ARBNT) — a precision-manufactured, black-finished barrel nut engineered for strength, repeatable torque, and reliable handguard indexing. Whether you’re building a match-grade rifle, a lightweight patrol carbine, or a dependable range gun, this barrel nut provides the foundation your upper receiver needs for consistent alignment, gas system timing, and secure attachment of free-float handguards.

Built for Strength, Machined for Precision

The barrel nut is one of the most important but often overlooked components of an AR-15. The ARBNT is produced to tight tolerances so the barrel seats squarely in the receiver and the gas tube aligns consistently with the gas block. Accurate threading and concentric machining reduce the risk of misalignment, stress on the barrel extension, and handguard wobble — delivering a rock-solid platform for optics, rails, and accessories.

Key Features & Benefits

• Model: ARBNT (LBE Unlimited)

• UPC: 765857617428

• Finish: Black — low-glare, corrosion-resistant surface treatment that blends with most Black anodized or Cerakote components.

• Precision Threads: Factory-cut threads for accurate fitment and repeatable installation.

• Repeatable Torque Stability: Designed to hold torque and maintain headspacing and barrel alignment under repeated firing and thermal cycling.

• Handguard Compatibility: Works with many free-float handguards and rail systems that index to a standard AR-style barrel nut. Verify specific handguard requirements before purchase.

• Durable Construction: Built to withstand the forces of sustained fire and repeated install/removal cycles without deforming or galling.

• Drop-In Upgrade: Simple upgrade or replacement for builders and armorers looking to improve their upper assembly durability and alignment.

Why a Quality Barrel Nut Matters

A quality barrel nut does more than simply thread the barrel to the receiver — it sets the stage for gas system timing, gas tube alignment, and stable handguard mounting. Poorly made nuts can distort under torque, misalign the gas tube, or allow a handguard to move, which affects accuracy and reliability. The LBE Unlimited ARBNT is intended to give you consistent results: proper gas alignment, solid handguard fitment, and a dependable foundation for long-term use.

Installation & Armorer Tips

• Tools Required: Armorer’s wrench or compatible barrel-nut wrench, torque wrench, receiver vise block, and proper shims/crush washer if applicable.

• Torque Procedure: Follow the barrel manufacturer’s recommended torque specifications. Many installations use a torque-to-headspace or torque-then-index method — follow the barrel and upper receiver guidance for best results.

• Handguard Fit: When installing a free-float handguard, ensure the handguard’s mounting flange/indexing tabs match the barrel nut design. Some handguards require specific nut variants or alignment flats.

• Gas Tube Alignment: Before final tightening, confirm the gas tube aligns squarely through the gas block and into the receiver gas key. Small misalignments can cause cycling issues or increased wear.

• Break-In: After building, perform a function check and live-fire verification to validate bolt timing, gas performance, and handguard stability.

Compatibility & Considerations

• Platform: AR-15 / .223 / 5.56 platforms using standard AR-style barrel nut interface.

• Handguards: Compatible with most barrel-nut-mounted free-float handguards; confirm compatibility with your specific handguard manufacturer.

• Gas Systems: Works with direct-impingement AR-15 gas systems when properly indexed and installed.

• Not Universal: Some proprietary or low-profile handguards and nut systems require specific nut geometries — double-check part compatibility before purchase.

Maintenance & Care

• Keep mating surfaces clean when installing — carbon or debris can affect torque readings and alignment.

• Use a thin coat of anti-seize if recommended by the barrel or receiver manufacturer to reduce galling on repeated installs (verify material compatibility).

• Periodically inspect threads and handguard interface points for wear or deformation after extensive use. Replace if thread damage or excessive wear is observed.

Ideal For

• Builders assembling precision or duty AR-15 uppers

• Shooters upgrading cheap or damaged barrel nuts for improved reliability

• Armorers and gunsmiths who require consistent, repeatable fitment across builds

• Anyone mounting a free-float handguard that depends on a robust barrel-nut interface

Technical Summary

• Model: ARBNT

• Manufacturer: LBE Unlimited

• UPC: 765857617428

• Finish: Black (low-glare, corrosion-resistant)

• Application: AR-15 upper receiver / free-float handguard mounting / barrel retention

• Included: 1 × LBE Unlimited Barrel Nut (installation hardware may vary; check parts kit)

Final Thoughts

Don’t let a low-quality barrel nut undermine an otherwise great build. The LBE Unlimited ARBNT delivers the dependable alignment, torque stability, and rugged finish you need for a long-lasting AR-15 upper. Whether you’re building a competition rifle, a duty carbine, or a precision match gun, this barrel nut gives you the solid mechanical foundation to mount handguards, align gas systems, and keep your rifle shooting true.

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